UIJKL
This file stores the effectively screened Coulomb integrals
- [math]\displaystyle{ U_{ijkl}^{\sigma\sigma'} = \int {\rm d}{\bf r}\int {\rm d}{\bf r}' w_{i}^{*\sigma}({\bf r}) w_{j}^{\sigma}({\bf r}) U({\bf r},{\bf r}',\omega) w_{k}^{*\sigma'}({\bf r}') w_{l}^{\sigma'}({\bf r}') }[/math]
in following format
# U_ijkl = [ij,R|kl,0] # I J K L RE(V_IJKL) IM(V_IJKL) 1 1 1 1 4.3457689208 0.0000000000 2 1 1 1 0.0000021313 0.0000001349 ...